diff --git a/samples/net/lwm2m_client/overlay-nrf91x.conf b/samples/net/lwm2m_client/overlay-nrf91x.conf
new file mode 100644
index 00000000000..9597791c10e
--- /dev/null
+++ b/samples/net/lwm2m_client/overlay-nrf91x.conf
@@ -0,0 +1,53 @@
+# Configuration file for nRF91x
+# This file is merged with prj.conf in the application folder, and options
+# set here will take precedence if they are present in both files.
+
+# General
+CONFIG_MAIN_STACK_SIZE=4096
+
+CONFIG_NET_SOCKETS=y
+CONFIG_NET_NATIVE=y
+CONFIG_NET_SOCKETS_OFFLOAD=y
+
+CONFIG_NET_CONFIG_MY_IPV6_ADDR=""
+CONFIG_NET_CONFIG_PEER_IPV6_ADDR=""
+CONFIG_NET_CONFIG_MY_IPV4_ADDR=""
+CONFIG_NET_CONFIG_MY_IPV4_GW=""
+
+CONFIG_NET_CONFIG_NEED_IPV6=n
+CONFIG_NET_CONFIG_NEED_IPV4=n
+CONFIG_NET_CONFIG_AUTO_INIT=n
+
+# Modem related configurations
+CONFIG_NRF_MODEM_LIB_NET_IF=y
+CONFIG_NRF_MODEM_LIB_NET_IF_AUTO_DOWN=n
+CONFIG_NRF_MODEM_LIB_NET_IF_AUTO_CONNECT=n
+CONFIG_NRF_MODEM_LIB_NET_IF_AUTO_START=n
+CONFIG_NRF_MODEM_LIB_ON_FAULT_APPLICATION_SPECIFIC=y
+
+CONFIG_LTE_LINK_CONTROL_LOG_LEVEL_DBG=n
+CONFIG_NRF_MODEM_LIB_NET_IF_LOG_LEVEL_DBG=n
+
+# Disable Duplicate Address Detection (DAD)
+# due to not being properly implemented for offloaded interfaces.
+CONFIG_NET_IPV6_NBR_CACHE=n
+CONFIG_NET_IPV6_MLD=n
+
+# Zephyr NET Connection Manager and Connectivity layer.
+CONFIG_NET_CONNECTION_MANAGER=y
+CONFIG_NET_CONNECTION_MANAGER_MONITOR_STACK_SIZE=1024
+
+CONFIG_LWM2M_APP_ID="nrf91x"
+CONFIG_LWM2M_APP_SERVER="coaps://leshan.eclipseprojects.io:5684"
+CONFIG_LWM2M_DNS_SUPPORT=y
+
+## Enable DTLS support
+CONFIG_LWM2M_DTLS_SUPPORT=y
+CONFIG_LWM2M_TLS_SESSION_CACHING=y
+CONFIG_LWM2M_DTLS_CID=y
+CONFIG_TLS_CREDENTIALS=y
+
+## Crypto
+CONFIG_OBERON_BACKEND=y
+CONFIG_NORDIC_SECURITY_BACKEND=y
+CONFIG_MBEDTLS_SHA256_C=y